High Capacity Transmission Systems Using Homogeneous Multi-Core Fibers

Puttnam, Benjamin J.; Luís, Ruben S.; Agrell, Erik; Rademacher, Georg; Shen, Jun; Klaus, Werner; Saridis, George M.; Awaji, Yoshinari; Wada, Naoya

doi:10.1109/jlt.2017.2669207

Cited by 66 publications

(21 citation statements)

References 58 publications

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“…2. For more detailed information on the transmitter setup, please see Puttnam et al 66 . Note that for the long term measurements of the CV-QKD performance, we use full load band without inserting the test channels.…”

Section: Methodsmentioning

confidence: 99%

Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

et al. 2019

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Quantum key distribution (QKD) can offer communication with unconditional security and is a promising technology to protect next generation communication systems. For QKD to see commercial success, several key challenges have to be solved, such as integrating QKD signals into existing fiber optical networks. In this paper, we present experimental verification of QKD co-propagating with a large number of wavelength division multiplexing (WDM) coherent data channels. We show successful secret key generation over 24 h for a continuous-variable QKD channel jointly transmitted with 100 WDM channels of erbium doped fiber amplified polarization multiplexed 16-ary quadrature amplitude modulation signals amounting to a datarate of 18.3 Tbit/s. Compared to previous co-propagation results in the C-band, we demonstrate more than a factor of 10 increase in the number of WDM channels and more than 90 times higher classical bitrate, showing the co-propagation with Tbit/s data-carrying channels.

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Section: Methodsmentioning

confidence: 99%

Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

et al. 2019

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“…The experimental setup for the investigation of high datarate transmission systems is shown in Figure 3. A comb source generated more than 400 carrier lines in a 25 GHz spacing across the C + L bands [23], [3]. The output of the comb was split into a test and a dummy channel part.…”

Section: Methodsmentioning

confidence: 99%

“…In SDM transmission systems, fibers with parallel propagation paths may be used to transmit independent data-streams at the same spectral bands. Suitable fibers for SDM can be either uncoupled multi-core fibers (MCF) [3], where several single-mode fiber cores are arranged inside one fiber cladding or few-and multi-mode fibers (FMF or MMF) [4] where a single fiber core can support the transmission of several orthogonal fiber modes. Hybrid combinations of the two approaches are also attractive and have been used to demonstrate the highest recorded data-rate in a single fiber to date [5], almost 100 times higher than the record throughput in standard SMFs.…”

Section: Introductionmentioning

confidence: 99%

High Capacity Transmission With Few-Mode Fibers

Rademacher

Luís

Puttnam

et al. 2019

J. Lightwave Technol.

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We experimentally investigate high-capacity fewmode fiber transmission for short and medium-haul optical links. In separate experiments, we demonstrate C + L band transmission of 283 Tbit/s over a single 30 km span and 159 Tbit/s over 1045 km looped transmission in a graded-index three mode fiber. The first experiment reached a data-rate per fiber mode within 90% of the record data-rates reported in the same transmission bands for single-mode fiber. The second experiment demonstrated the feasibility of reaching high data-rates over long distance few-mode fiber transmission, despite strong impairments due to mode-dependent loss and differential mode delay.

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“…One is the mode‐division multiplexing (MDM) using multiple guided modes, and the other one is using multiple cores . These two have been studied not only for the long‐haul networks but also for short‐distance optical interconnects (including photonic networks‐on‐chip) . For SDM systems, some special photonic devices and circuits are needed.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Sharp Multimode Waveguide Bends with Subwavelength Gratings

Song

et al. 2019

Laser & Photonics Reviews

110

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Mode‐division multiplexing (MDM) is attractive to enhance the link capacity of optical interconnects by using multiple mode‐channels in multimode bus waveguides. As sharp waveguide bends are very important for realizing dense photonic integrated circuits, here ultra‐sharp multimode waveguide bends for MDM systems are proposed and demonstrated by using subwavelength grating waveguide structures on silicon. An ultra‐sharp S‐bend with a radius of 10 µm is realized for the first time to enable a low‐loss and low‐crosstalk MDM optical interconnect with three mode‐channels. For this proposed ultra‐sharp subwavelength grating multimode waveguide bend (SMWB) with a 90° bending angle, the theoretical excess losses for the TE0, TE1, and TE2 modes are 0.1–0.3 dB, 0.18–0.22 dB, and 0.3–0.5 dB, respectively, in a wavelength band of 1500–1600 nm. Meanwhile, inter‐mode crosstalks are very low (less than −30 dB) for all mode‐channels. For the fabricated 90°‐SMWB, the excess losses for the TE0, TE1, and TE2 modes are 0.1–0.3 dB, 0.2–0.4 dB, and 0.3–0.7 dB while the inter‐mode crosstalk is approximately −22 dB in a wavelength band of 1520–1600 nm. The proposed SMWB is also extended for more than three mode‐channels.

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High Capacity Transmission Systems Using Homogeneous Multi-Core Fibers

Cited by 66 publications

References 58 publications

Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

High Capacity Transmission With Few-Mode Fibers

Ultra‐Sharp Multimode Waveguide Bends with Subwavelength Gratings

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